refactor(HomeController): remove culture binding as viewdata; bind via string localizer

EnvelopeGenerator.Application/Key.cs

@@ -1,82 +0,0 @@
-namespace EnvelopeGenerator.Application;
-
-/// <summary>
-/// 
-/// </summary>
-public static class Key
-{
-    /// <summary>
-    /// 
-    /// </summary>
-    public static readonly string InnerServiceError = nameof(InnerServiceError);
-
-    /// <summary>
-    /// 
-    /// </summary>
-    public static readonly string EnvelopeNotFound = nameof(EnvelopeNotFound);
-
-    /// <summary>
-    /// 
-    /// </summary>
-    public static readonly string EnvelopeReceiverNotFound = nameof(EnvelopeReceiverNotFound);
-
-    /// <summary>
-    /// 
-    /// </summary>
-    public static readonly string AccessCodeNull = nameof(AccessCodeNull);
-
-    /// <summary>
-    /// 
-    /// </summary>
-    public static readonly string WrongAccessCode = nameof(WrongAccessCode);
-
-    /// <summary>
-    /// 
-    /// </summary>
-    public static readonly string DataIntegrityIssue = nameof(DataIntegrityIssue);
-
-    /// <summary>
-    /// 
-    /// </summary>
-    public static readonly string SecurityBreachOrDataIntegrity = nameof(SecurityBreachOrDataIntegrity);
-
-    /// <summary>
-    /// 
-    /// </summary>
-    public static readonly string PossibleDataIntegrityIssue = nameof(PossibleDataIntegrityIssue);
-
-    /// <summary>
-    /// 
-    /// </summary>
-    public static readonly string SecurityBreach = nameof(SecurityBreach);
-
-    /// <summary>
-    /// 
-    /// </summary>
-    public static readonly string PossibleSecurityBreach = nameof(PossibleSecurityBreach);
-
-    /// <summary>
-    /// 
-    /// </summary>
-    public static readonly string WrongEnvelopeReceiverId = nameof(WrongEnvelopeReceiverId);
-
-    /// <summary>
-    /// 
-    /// </summary>
-    public static readonly string EnvelopeOrReceiverNonexists = nameof(EnvelopeOrReceiverNonexists);
-
-    /// <summary>
-    /// 
-    /// </summary>
-    public static readonly string PhoneNumberNonexists = nameof(PhoneNumberNonexists);
-
-    /// <summary>
-    /// 
-    /// </summary>
-    public static readonly string Default = nameof(Default);
-
-    /// <summary>
-    /// 
-    /// </summary>
-    public static readonly string DbMigrationTest = nameof(DbMigrationTest);
-}

EnvelopeGenerator.Application/Resources/Resource.cs

@@ -1,9 +1,137 @@
-namespace EnvelopeGenerator.Application.Resources
+using Microsoft.Extensions.Localization;
+using System.Runtime.CompilerServices;
+
+namespace EnvelopeGenerator.Application.Resources;
+
+/// <summary>
+/// The place holder class for Resource.*.resx
+/// </summary>
+public class Resource
+{
+}
+
+//TODO: use code generator
+/// <summary>
+/// 
+/// </summary>
+public static class Extensions
 {
     /// <summary>
-    /// The place holder class for Resource.*.resx
+    /// 
     /// </summary>
-    public class Resource
+    /// <param name="localizer"></param>
-    {
+    /// <returns></returns>
-    }
+    public static string InnerServiceError(this IStringLocalizer localizer) => localizer[nameof(InnerServiceError)];
-}
+
+    /// <summary>
+    /// 
+    /// </summary>
+    /// <param name="localizer"></param>
+    /// <returns></returns>
+    public static string EnvelopeNotFound(this IStringLocalizer localizer) => localizer[nameof(EnvelopeNotFound)];
+
+    /// <summary>
+    /// 
+    /// </summary>
+    /// <param name="localizer"></param>
+    /// <returns></returns>
+    public static string EnvelopeReceiverNotFound(this IStringLocalizer localizer) => localizer[nameof(EnvelopeReceiverNotFound)];
+
+    /// <summary>
+    /// 
+    /// </summary>
+    /// <param name="localizer"></param>
+    /// <returns></returns>
+    public static string AccessCodeNull(this IStringLocalizer localizer) => localizer[nameof(AccessCodeNull)];
+
+    /// <summary>
+    /// 
+    /// </summary>
+    /// <param name="localizer"></param>
+    /// <returns></returns>
+    public static string WrongAccessCode(this IStringLocalizer localizer) => localizer[nameof(WrongAccessCode)];
+
+    /// <summary>
+    /// 
+    /// </summary>
+    /// <param name="localizer"></param>
+    /// <returns></returns>
+    public static string DataIntegrityIssue(this IStringLocalizer localizer) => localizer[nameof(DataIntegrityIssue)];
+
+    /// <summary>
+    /// 
+    /// </summary>
+    /// <param name="localizer"></param>
+    /// <returns></returns>
+    public static string SecurityBreachOrDataIntegrity(this IStringLocalizer localizer) => localizer[nameof(SecurityBreachOrDataIntegrity)];
+
+    /// <summary>
+    /// 
+    /// </summary>
+    /// <param name="localizer"></param>
+    /// <returns></returns>
+    public static string PossibleDataIntegrityIssue(this IStringLocalizer localizer) => localizer[nameof(PossibleDataIntegrityIssue)];
+
+    /// <summary>
+    /// 
+    /// </summary>
+    /// <param name="localizer"></param>
+    /// <returns></returns>
+    public static string SecurityBreach(this IStringLocalizer localizer) => localizer[nameof(SecurityBreach)];
+
+    /// <summary>
+    /// 
+    /// </summary>
+    /// <param name="localizer"></param>
+    /// <returns></returns>
+    public static string PossibleSecurityBreach(this IStringLocalizer localizer) => localizer[nameof(PossibleSecurityBreach)];
+
+    /// <summary>
+    /// 
+    /// </summary>
+    /// <param name="localizer"></param>
+    /// <returns></returns>
+    public static string WrongEnvelopeReceiverId(this IStringLocalizer localizer) => localizer[nameof(WrongEnvelopeReceiverId)];
+
+    /// <summary>
+    /// 
+    /// </summary>
+    /// <param name="localizer"></param>
+    /// <returns></returns>
+    public static string EnvelopeOrReceiverNonexists(this IStringLocalizer localizer) => localizer[nameof(EnvelopeOrReceiverNonexists)];
+
+    /// <summary>
+    /// 
+    /// </summary>
+    /// <param name="localizer"></param>
+    /// <returns></returns>
+    public static string PhoneNumberNonexists(this IStringLocalizer localizer) => localizer[nameof(PhoneNumberNonexists)];
+
+    /// <summary>
+    /// 
+    /// </summary>
+    /// <param name="localizer"></param>
+    /// <returns></returns>
+    public static string Default(this IStringLocalizer localizer) => localizer[nameof(Default)];
+
+    /// <summary>
+    /// 
+    /// </summary>
+    /// <param name="localizer"></param>
+    /// <returns></returns>
+    public static string DbMigrationTest(this IStringLocalizer localizer) => localizer[nameof(DbMigrationTest)];
+
+    /// <summary>
+    /// 
+    /// </summary>
+    /// <param name="localizer"></param>
+    /// <returns></returns>
+    public static string Culture(this IStringLocalizer localizer) => localizer[nameof(Culture)];
+
+    /// <summary>
+    /// 
+    /// </summary>
+    /// <param name="localizer"></param>
+    /// <returns></returns>
+    public static string FiClass(this IStringLocalizer localizer) => localizer[nameof(FiClass)];
+}

EnvelopeGenerator.Application/Resources/Resource.de-DE.resx

@@ -129,6 +129,9 @@
   <data name="Confirmation" xml:space="preserve">
     <value>Bestätigung</value>
   </data>
+  <data name="Culture" xml:space="preserve">
+    <value>de-DE</value>
+  </data>
   <data name="de-DE" xml:space="preserve">
     <value>Deutch</value>
   </data>
@@ -150,6 +153,9 @@
   <data name="EnvelopeInfo2" xml:space="preserve">
     <value>Erstellt am {0} von {1}. Sie können den Absender über &lt;span class="highlight highlight-envelope-info-2"&gt;&lt;a class="mail-link" href="mailto:{2}?subject={3}&amp;body=Sehr%20geehrter%20{4}%20{5},%0A%0A%0A"&gt;{6}&lt;/a&gt;&lt;/span&gt; kontaktieren.</value>
   </data>
+  <data name="FiClass" xml:space="preserve">
+    <value>fi-de</value>
+  </data>
   <data name="Finalize" xml:space="preserve">
     <value>Abschließen</value>
   </data>

EnvelopeGenerator.Application/Resources/Resource.en-US.resx

@@ -129,6 +129,9 @@
   <data name="Confirmation" xml:space="preserve">
     <value>Confirmation</value>
   </data>
+  <data name="Culture" xml:space="preserve">
+    <value>en-US</value>
+  </data>
   <data name="de-DE" xml:space="preserve">
     <value>German</value>
   </data>
@@ -150,6 +153,9 @@
   <data name="EnvelopeInfo2" xml:space="preserve">
     <value>Created on {0} by {1}. You can contact the sender via &lt;span class="highlight highlight-envelope-info-2"&gt;&lt;a class="mail-link" href="mailto:{2}?subject={3}&amp;body=Dear%20{4}%20{5},%0A%0A%0A"&gt;{6}&lt;/a&gt;&lt;/span&gt;.</value>
   </data>
+  <data name="FiClass" xml:space="preserve">
+    <value>fi-us</value>
+  </data>
   <data name="Finalize" xml:space="preserve">
     <value>Finalize</value>
   </data>

EnvelopeGenerator.Application/Services/EmailTemplateService.cs

@@ -36,7 +36,7 @@ public class EmailTemplateService : BasicCRUDService<IEmailTemplateRepository, E
         var temp = await _repository.ReadByNameAsync(type);
         return temp is null 
             ? Result.Fail<EmailTemplateDto>()
-                .Message(Key.InnerServiceError)
+                .Message("InnerServiceError")
                 .Notice(LogLevel.Error, Flag.DataIntegrityIssue, $"EmailTemplateType '{type}' is not found in DB. Please, define required e-mail template.")
             : Result.Success(_mapper.Map<EmailTemplateDto>(temp));
     }

EnvelopeGenerator.Application/Services/EnvelopeReceiverService.cs

@@ -82,7 +82,7 @@ public class EnvelopeReceiverService : BasicCRUDService<IEnvelopeReceiverReposit
         var env_rcvs = await _repository.ReadByUuidAsync(uuid: uuid, withEnvelope: withEnvelope, withReceiver: withReceiver);
         if( env_rcvs is null || !env_rcvs.Any())
             return Result.Fail<IEnumerable<string?>>()
-                .Message(_localizer[Key.EnvelopeReceiverNotFound]);
+                .Message(_localizer.EnvelopeReceiverNotFound());
         return Result.Success(env_rcvs.Select(er => er.AccessCode) ?? Enumerable.Empty<string?>());
     }
 
@@ -100,7 +100,7 @@ public class EnvelopeReceiverService : BasicCRUDService<IEnvelopeReceiverReposit
         var env_rcv = await _repository.ReadByUuidSignatureAsync(uuid: uuid, signature: signature, withEnvelope: withEnvelope, withReceiver: withReceiver, readOnly: readOnly);
         if (env_rcv is null)
             return Result.Fail<EnvelopeReceiverDto>()
-                .Message(Key.EnvelopeReceiverNotFound);
+                .Message("EnvelopeReceiverNotFound");
 
         return Result.Success(_mapper.Map<EnvelopeReceiverDto>(env_rcv));
     }
@@ -119,7 +119,7 @@ public class EnvelopeReceiverService : BasicCRUDService<IEnvelopeReceiverReposit
         var env_rcv = await _repository.ReadByUuidSignatureAsync(uuid: uuid, signature: signature, withEnvelope: withEnvelope, withReceiver: withReceiver, readOnly: readOnly);
         if (env_rcv is null)
             return Result.Fail<EnvelopeReceiverSecretDto>()
-                .Message(Key.EnvelopeReceiverNotFound);
+                .Message("EnvelopeReceiverNotFound");
 
         return Result.Success(_mapper.Map<EnvelopeReceiverSecretDto>(env_rcv));
     }
@@ -138,7 +138,7 @@ public class EnvelopeReceiverService : BasicCRUDService<IEnvelopeReceiverReposit
 
         if (uuid is null || signature is null)
             return Result.Fail<EnvelopeReceiverDto>()
-                .Message(_localizer[Key.WrongEnvelopeReceiverId])
+                .Message(_localizer.WrongEnvelopeReceiverId())
                 .Notice(LogLevel.Warning, (uuid, signature).ToTitle())
                 .Notice(LogLevel.Warning, EnvelopeFlag.WrongEnvelopeReceiverId)
                 .Notice(LogLevel.Warning, Flag.PossibleSecurityBreach);
@@ -159,7 +159,7 @@ public class EnvelopeReceiverService : BasicCRUDService<IEnvelopeReceiverReposit
 
         if (er is null)
             return Result.Fail<bool>()
-                .Message(_localizer[Key.EnvelopeOrReceiverNonexists])
+                .Message(_localizer.EnvelopeOrReceiverNonexists())
                 .Notice(LogLevel.Warning, (uuid, signature).ToTitle())
                 .Notice(LogLevel.Warning, EnvelopeFlag.EnvelopeOrReceiverNonexists)
                 .Notice(LogLevel.Warning, Flag.PossibleDataIntegrityIssue);
@@ -168,13 +168,13 @@ public class EnvelopeReceiverService : BasicCRUDService<IEnvelopeReceiverReposit
 
         if (actualAccessCode is null)
             return Result.Fail<bool>()
-                .Message(_localizer[Key.AccessCodeNull])
+                .Message(_localizer.AccessCodeNull())
                 .Notice(LogLevel.Critical, (uuid, signature).ToTitle())
                 .Notice(LogLevel.Critical, EnvelopeFlag.AccessCodeNull)
                 .Notice(LogLevel.Critical, Flag.DataIntegrityIssue);
 
         else if (accessCode != actualAccessCode)
-            return Result.Success(false).Message(_localizer[Key.WrongAccessCode]);
+            return Result.Success(false).Message(_localizer.WrongAccessCode());
         else
             return Result.Success(true);
     }
@@ -191,7 +191,7 @@ public class EnvelopeReceiverService : BasicCRUDService<IEnvelopeReceiverReposit
 
         if (uuid is null || signature is null)
             return Result.Fail<bool>()
-                .Message(Key.WrongEnvelopeReceiverId)
+                .Message("WrongEnvelopeReceiverId")
                 .Notice(LogLevel.Critical, EnvelopeFlag.WrongEnvelopeReceiverId)
                 .Notice(LogLevel.Critical, Flag.SecurityBreach)
                 .Notice(LogLevel.Critical, "Attempt to verify access code detected. Such actions are generally not initiated by well-intentioned users. Potential security breach suspected. Immediate investigation required.");
@@ -287,7 +287,7 @@ public class EnvelopeReceiverService : BasicCRUDService<IEnvelopeReceiverReposit
 
         if (uuid is null || signature is null)
             return Result.Fail<SmsResponse>()
-                .Message(_localizer[Key.WrongEnvelopeReceiverId])
+                .Message(_localizer.WrongEnvelopeReceiverId())
                 .Notice(LogLevel.Warning, (uuid, signature).ToTitle())
                 .Notice(LogLevel.Warning, EnvelopeFlag.WrongEnvelopeReceiverId)
                 .Notice(LogLevel.Warning, Flag.PossibleSecurityBreach);
@@ -295,11 +295,11 @@ public class EnvelopeReceiverService : BasicCRUDService<IEnvelopeReceiverReposit
         var env_rcv = await _repository.ReadByUuidSignatureAsync(uuid: uuid, signature: signature, withEnvelope: false, withReceiver: false);
         if (env_rcv is null)
             return Result.Fail<SmsResponse>()
-                .Message(Key.EnvelopeReceiverNotFound);
+                .Message("EnvelopeReceiverNotFound");
 
         if (env_rcv.PhoneNumber is null)
             return Result.Fail<SmsResponse>()
-                .Message(Key.PhoneNumberNonexists)
+                .Message("PhoneNumberNonexists")
                 .Notice(LogLevel.Error, Flag.NotFound, $"An attempt was made to send sms to the user whose phone number is null. Envelope recipient ID is {envelopeReceiverId}, UUID is {uuid} and signature is {signature}.");
 
         var res = await _smsSender.SendSmsAsync(recipient: env_rcv.PhoneNumber, message: message);

EnvelopeGenerator.Web/Controllers/ControllerBaseExtensions.cs

@@ -1,7 +1,8 @@
 using EnvelopeGenerator.Application.Dto.EnvelopeReceiver;
 using EnvelopeGenerator.Web.Models;
-using Microsoft.AspNetCore.Authentication.Cookies;
 using Microsoft.AspNetCore.Authentication;
+using Microsoft.AspNetCore.Authentication.Cookies;
+using Microsoft.AspNetCore.Localization;
 using Microsoft.AspNetCore.Mvc;
 using System.Security.Claims;
 
@@ -55,6 +56,25 @@ namespace EnvelopeGenerator.Web.Controllers
         }
         #endregion
 
+        #region Cookie
+        public static string? GetCulture(this IRequestCookieCollection cookies)
+            => cookies[CookieRequestCultureProvider.DefaultCookieName];
+
+        public static void SetCulture(this IResponseCookies cookies, string culture)
+        {
+            var cookieOptions = new CookieOptions
+            {
+                Secure = false,
+                SameSite = SameSiteMode.Strict,
+                HttpOnly = true
+            };
+            cookies.Append(
+                CookieRequestCultureProvider.DefaultCookieName,
+                CookieRequestCultureProvider.MakeCookieValue(new RequestCulture(culture)),
+                cookieOptions);
+        }
+        #endregion
+
         #region View error
         //TODO: integrate localizer for ready-to-use views
         //TODO: integrate to global exception handler middleware

EnvelopeGenerator.Web/Controllers/HomeController.cs

@@ -58,8 +58,6 @@ public class HomeController : ViewControllerBase
     [HttpGet("/")]
     public IActionResult Main()
     {
-        ViewData["UserCulture"] = _cultures[UserLanguage];
-
         return View(new MainViewModel()
         {
             Title = _configuration["MainPageTitle"]
@@ -118,8 +116,6 @@ public class HomeController : ViewControllerBase
     {
         try
         {
-            ViewData["UserCulture"] = _cultures[UserLanguage];
-
             return await _envRcvService.ReadByEnvelopeReceiverIdAsync(envelopeReceiverId: envelopeReceiverId).ThenAsync(
             SuccessAsync: async er => {
                 if (User.IsInRole(ReceiverRole.FullyAuth))
@@ -151,7 +147,6 @@ public class HomeController : ViewControllerBase
     {
         try
         {
-            ViewData["UserCulture"] = _cultures[UserLanguage];
             ViewData["EnvelopeKey"] = envelopeReceiverId;
 
             envelopeReceiverId = _sanitizer.Sanitize(envelopeReceiverId);
@@ -310,7 +305,6 @@ public class HomeController : ViewControllerBase
     {
         try
         {
-            ViewData["UserCulture"] = _cultures[UserLanguage];
             ViewData["EnvelopeKey"] = envelopeReceiverId;
 
             envelopeReceiverId = _sanitizer.Sanitize(envelopeReceiverId);
@@ -398,7 +392,6 @@ public class HomeController : ViewControllerBase
                         return base.Redirect($"/EnvelopeKey/{envelopeReceiverId}/Locked");
 
                     await HttpContext.SignOutAsync(CookieAuthenticationDefaults.AuthenticationScheme);
-                    ViewData["UserCulture"] = _cultures[UserLanguage];
                     ViewData["EnvelopeKey"] = envelopeReceiverId;
                     return base.View();
                 }),
@@ -428,8 +421,6 @@ public class HomeController : ViewControllerBase
             return await _envRcvService.ReadByEnvelopeReceiverIdAsync(envelopeReceiverId).ThenAsync(
                 SuccessAsync: async (er) =>
                 {
-                    ViewData["UserCulture"] = _cultures[UserLanguage];
-                    ViewData["UserCulture"] = _cultures[UserLanguage];
                     return await _historyService.IsRejected(envelopeId: er.EnvelopeId)
                         ? View(er)
                         : Redirect($"/EnvelopeKey/{envelopeReceiverId}/Locked");
@@ -454,8 +445,6 @@ public class HomeController : ViewControllerBase
     {
         try
         {
-            ViewData["UserCulture"] = _cultures[UserLanguage];
-
             readOnlyKey = _sanitizer.Sanitize(readOnlyKey);
 
             // check if the readOnlyId is valid
@@ -530,26 +519,15 @@ public class HomeController : ViewControllerBase
         return Ok(new { EnvelopeUuid = envelopeUuid, ReceiverSignature = receiverSignature });
     }
 
-    [HttpPost("lang/{language}")]
+    [HttpPost("lang/{culture}")]
-    public IActionResult SetLanguage([FromRoute] string language)
+    public IActionResult SetLanguage([FromRoute] string culture)
     {
         try
         {
-            language = _sanitizer.Sanitize(language);
+            if (!_cultures.Languages.Contains(culture))
-            if (!_cultures.Languages.Contains(language))
                 return BadRequest();
 
-            var cookieOptions = new CookieOptions()
+            Response.Cookies.SetCulture(culture);
-            {
-                Secure = false,
-                SameSite = SameSiteMode.Strict,
-                HttpOnly = true
-            };
-
-            Response.Cookies.Append(
-                CookieRequestCultureProvider.DefaultCookieName,
-                CookieRequestCultureProvider.MakeCookieValue(new RequestCulture(language)),
-                cookieOptions);
 
             return Redirect(Request.Headers["Referer"].ToString());
         }
@@ -563,7 +541,5 @@ public class HomeController : ViewControllerBase
     [HttpGet("lang")]
     public IActionResult GetLanguages() => Ok(_cultures.Languages);
 
-    private string? UserLanguage => Request.Cookies[CookieRequestCultureProvider.DefaultCookieName];
-
     public IActionResult Error404() => this.ViewError404();
 }

EnvelopeGenerator.Web/Middleware/CultureMiddleware.cs

@@ -1,4 +1,5 @@
-using EnvelopeGenerator.Web.Models;
+using EnvelopeGenerator.Web.Controllers;
+using EnvelopeGenerator.Web.Models;
 using Microsoft.AspNetCore.Localization;
 using Microsoft.Extensions.Options;
 using System.Globalization;
@@ -23,20 +24,7 @@ public class CultureMiddleware
 
         if (string.IsNullOrEmpty(cookieValue))
         {
-            var culture = new RequestCulture(_cultures.Default.Language);
+            context.Response.Cookies.SetCulture(_cultures.Default.Language);
-
-            var cookieOptions = new CookieOptions
-            {
-                Secure = false,
-                SameSite = SameSiteMode.Strict,
-                HttpOnly = true
-            };
-
-            context.Response.Cookies.Append(
-                cookieName,
-                CookieRequestCultureProvider.MakeCookieValue(culture),
-                cookieOptions);
-
             CultureInfo.CurrentCulture = new CultureInfo(_cultures.Default.Language);
             CultureInfo.CurrentUICulture = new CultureInfo(_cultures.Default.Language);
         }

EnvelopeGenerator.Web/Program.cs

@@ -90,7 +90,7 @@ try
 
     //AddEF Core dbcontext
     var useDbMigration = Environment.GetEnvironmentVariable("MIGRATION_TEST_MODE") == true.ToString() || config.GetValue<bool>("UseDbMigration");
-    var cnnStrName = useDbMigration ? Key.DbMigrationTest : Key.Default;
+    var cnnStrName = useDbMigration ? "DbMigrationTest" : "Default";
     var connStr = config.GetConnectionString(cnnStrName)
         ?? throw new InvalidOperationException($"Connection string '{cnnStrName}' is missing in the application configuration.");
 

EnvelopeGenerator.Web/Services/DatabaseService.cs

@@ -57,7 +57,7 @@ namespace EnvelopeGenerator.Web.Services
             _logger = logger;
 
             _logger.LogInformation("Establishing MSSQL Database connection..");
-            MSSQL = new MSSQLServer(logConfig, config.GetConnectionString(Key.Default));
+            MSSQL = new MSSQLServer(logConfig, config.GetConnectionString("Default"));
 
             if (MSSQL.DBInitialized == true)
             {

EnvelopeGenerator.Web/Views/Home/EnvelopeLocked.cshtml

@@ -6,7 +6,6 @@
     var nonce = _accessor.HttpContext?.Items["csp-nonce"] as string;
     var cImg = _cImgOpt.Value;
     ViewData["Title"] = _localizer[WebKey.DocProtected];
-    var userCulture = ViewData["UserCulture"] as Culture;
     string codeType = ViewData["CodeType"] is string _codeType ? _codeType : "accessCode";
     string codeKeyName = (char.ToUpper(codeType[0]) + codeType.Substring(1)).Replace("Code", "");
     bool viaSms = codeType == "smsCode";

EnvelopeGenerator.Web/Views/Home/EnvelopeRejected.cshtml

@@ -10,7 +10,6 @@
 @using Newtonsoft.Json.Serialization
 @model EnvelopeReceiverDto;
 @{
-	var userCulture = ViewData["UserCulture"] as Culture;
 	var envelope = Model.Envelope;
 	var document = Model.Envelope?.Documents?.FirstOrDefault();
 	var sender = Model.Envelope?.User;

EnvelopeGenerator.Web/Views/Shared/_Layout.cshtml

@@ -3,9 +3,6 @@
 @using Newtonsoft.Json.Serialization
 @{
     var nonce = _accessor.HttpContext?.Items["csp-nonce"] as string;
-    var userCulture = ViewData["UserCulture"] as Culture;
-    //TODO: instead of default assignment add a middleware for culture
-    userCulture ??= _cultures.Default;
     var isReadOnly = false;
     if (ViewData["IsReadOnly"] is bool isReadOnly_bool)
         isReadOnly = isReadOnly_bool;
@@ -83,7 +80,7 @@
         <span>&copy; SignFlow 2023-2024 <a href="https://digitaldata.works" target="_blank">Digital Data GmbH</a></span>
         <div class="dropup flag-dropdown">
             <button class="btn btn-outline-secondary dropdown-toggle" type="button" id="langDropdownMenuButton" data-bs-toggle="dropdown" aria-expanded="false">
-                <span class="fi @userCulture?.FIClass.TrySanitize(_sanitizer) me-2" id="selectedFlag"></span><span id="selectedLanguage"></span>
+                <span class="fi @_localizer.FiClass() me-2" id="selectedFlag"></span><span id="selectedLanguage"></span>
             </button>
             <ul class="dropdown-menu" aria-labelledby="langDropdownMenuButton">
                 @foreach (var culture in _cultures)
@@ -98,7 +95,7 @@
                 }
             </ul>
         </div>
-        <a href="/privacy-policy.@(userCulture?.Language).html" target="_blank">@_localizer[WebKey.Privacy]</a>
+        <a href="/privacy-policy.@(_localizer.Culture()).html" target="_blank">@_localizer[WebKey.Privacy]</a>
     </footer>
 </body>
 </html>